Need an MP3 Batch splitter

I have a bunch of Text to Speech audio files that need to be broken down into 5 minute segments. I've found two different apps that will do this but each has a problem.

The first app won't do batch conversions so I have to initiate the split on EACH file which will take forever. The other program will do batch but completely wipes out the original title... ie 40 files turn into "track01, track02, etc"... which isn't useful.

I need a program that will batch split an MP3 while preserving at least some of the original file name so that I know what I'm looking at.